This problem involves matings on the Rhesus gene that determines the Rhesus or Rh blood type. Click on New Problem to start. The genotypes of two mates will be given on the second line. Calculate the genotypes of their offspring, the expected frequency of these genotypes, the phenotypes of the offspring, and the expected frequency of these phenotypes. Then enter your answers in the appropriate column. When you are finished click on the Submit Answer button. If you make a mistake, just correct the error and click on Submit Answer; you do not have to re-enter the whole answer again. If you cannot figure out the answer, click on the "I give up!" button.

Click on this link for a brief refresher on the Rh locus.